Lithium battery drying device

Abstract

This invention relates to a lithium battery drying device, belonging to the technical field of lithium battery dehydration devices, and solves the technical problem of low drying efficiency in existing lithium battery drying products. It includes a tray and a heating assembly. The tray is placed on the heating assembly via a gripping device, and the lithium battery is placed inverted within the tray. The heating assembly contacts the positive and negative terminals respectively, heating them through contact-based heat conduction. This invention improves lithium battery drying devices, meeting the requirements for high drying efficiency and short drying time for lithium batteries.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery processing water removal devices and relates to a lithium battery drying device. Background Art

[0002] The drying process in the production and manufacturing process of lithium-ion batteries has very strict control over moisture. Because lithium-ion batteries are very sensitive to moisture, excessive moisture content inside the battery will have a great impact on battery performance and safety. Therefore, in the production and manufacturing process of lithium-ion batteries, the battery will be vacuum heated and dried to remove excess moisture inside the battery.

[0003] The drying method in the prior art is to set a heating plate in the drying chamber, and the electric heating plate generates heat when it is powered on. When heating, the lithium battery is placed upright on a tray with a groove structure (with the positive and negative poles facing upwards), and heat conduction is carried out through the contact between the tray and the heating plate. The heat is transferred by the tray to heat up the battery and achieve the purpose of drying.

[0004] The designer of this case found that it has at least the following defects:

[0005] 1. Heat is transferred by the tray, and part of the heat is absorbed by the tray, which not only increases the heating time, but also wastes part of the heat, resulting in low energy utilization and high energy consumption.

[0006] 2. The battery absorbs heat through contact with the tray at the bottom for drying. The heat is transferred from the bottom of the battery to the top of the battery through the battery shell, and then through the shell through the diaphragm to the pole piece for drying. This will cause uneven heating of various parts of the battery at the beginning of the heating stage, the center of the battery is heated slowly, and the heat transfer efficiency is also slow.

[0007] In view of this, the present invention is proposed. Summary of the invention

[0008] The purpose of the present invention is to provide a lithium battery drying device to solve the technical problem of low efficiency of drying lithium batteries in the prior art products. The technical solution of this case has many technical benefits, as described below:

[0009] A drying device for a lithium battery is provided. The lithium battery comprises positive and negative poles. The drying device comprises a tray and a heating component. The tray is placed on the heating component by a grasping device. The lithium battery is placed in the tray in an inverted manner. The heating component is in contact with the positive and negative poles, respectively, and the positive and negative poles are heated by contact heat conduction.

[0010] For example, grooves for placing lithium batteries are arranged at intervals on the tray, the shape of the grooves is adapted to the lithium batteries, and baffles or baffle rings are arranged at the bottom ends of the grooves, and the baffles or baffle rings are used to carry the lithium batteries;

[0011] The baffle plate is provided with holes at positions corresponding to the positive and negative poles of the lithium battery, and the positive and negative poles of the lithium battery are in contact with the heating assembly through the holes respectively.

[0012] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0013] The technical solution of this case is to heat the lithium battery in an inverted manner, and the positive and negative poles are heated in direct contact with the heating component, thereby improving the drying efficiency of the lithium battery, shortening the heating time, and avoiding the problem of power consumption caused by heat transfer from the heating plate through the tray in the prior art. The contact drying method of the lithium battery pole designed by this patent is to contact the battery pole through the heating mechanism, and transfer heat to the inside of the battery through the pole, thereby achieving the effect of heating and drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a front view of the overall structure of the present invention;

[0016] Figure 2 It is the AA cross-sectional view of the present invention;

[0017] Figure 3 is a schematic diagram of a heating assembly of the present invention;

[0018] Figure 4 A schematic diagram of placing batteries on a tray of the present invention;

[0019] Figure 5 A schematic diagram of a fixing block being arranged on a support plate of the present invention;

[0020] in:

[0021] 1. Battery; 2. Tray; 21. Extension section; 3. Support plate; 4. Fixing block; 41. Heating block; 42. Mounting slot; 43. Mounting hole; 44. Spring; 45. Wire; 46. Bolt; 5. Frame. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0023] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this design and / or practice this method.

[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the form, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0025] As shown in Table 1, this patent heats the battery pole, and the heat passes through the heating block, pole, pole ear, and battery pole piece, so that the pole piece is quickly heated up and the battery is dried.

[0026]

[0027] Table 1

[0028] Table 1 shows the thermal conductivity of metal copper and aluminum. It can be seen that aluminum foil and copper foil, which are used as positive and negative electrode foils of lithium batteries, have good thermal conductivity. Therefore, heat can be quickly and evenly transferred to the inside of the battery through the tabs. The pole is connected to the tabs, and the heat transfer is fast.

[0029] Lithium batteries are equipped with positive and negative poles, which are connected to the positive and negative ears respectively. There is an explosion-proof valve between the positive and negative poles. Its function is to prevent the battery from having internal short circuits and other problems. The battery will heat up and expand rapidly. Then the valve will crack and discharge the gas and liquid inside.

[0030] like Figure 1 The drying device of the lithium battery 1 shown, the lithium battery 1 includes positive and negative poles, a tray 2 and a heating component, the tray 2 is placed on the heating component by a gripping device, the lithium battery 1 is placed in the tray 2 in an inverted manner, the heating component is in contact with the positive and negative poles, respectively, and the positive and negative poles are heated by contact heat conduction. The heating component is in contact with the pole of the battery 1, and the heat is transferred to the inside of the battery 1 through the pole, so as to achieve the effect of heating and drying.

[0031] The structure of the tray 2 is as follows: Figure 2 As shown in FIG. 4 , the tray 2 is provided with recesses 22 or battery holes for placing the lithium battery 1 at intervals, and the recesses or battery holes 1 are provided with a preset height, and the preset height can be one-third to two-thirds of the height of the lithium battery 1, or other height settings;

[0032] When the groove is opened, three holes are correspondingly set at the bottom of the groove for the positive and negative poles of the battery 1 and the explosion-proof valve to pass through; when the battery 1 hole is opened, a baffle or retaining ring 23 is set at the bottom of the hole, and the baffle or retaining ring is used to carry the lithium battery 1. The middle of the bottom of the tray 2 is hollowed out to facilitate the docking of the tray 2 with the heating component.

[0033] The above-mentioned groove and battery hole are adapted to the lithium battery 1, and the groove is preferably a square groove. The tray 2 and below the groove battery 1 hole is a hollow structure, and the hollow structure can be provided with multiple legs 23 in the vertical direction to facilitate the assembly or placement of the tray 2 and the heating component.

[0034] Furthermore, the existing battery 1 is dried using automated equipment, such as Figure 1 and Figure 4 As shown, for example, a mechanical gripper, therefore, a protruding section 21 is provided on the top side of the tray 2, and the protruding section 21 extends in the horizontal direction. The mechanical gripper grasps the protruding section to replace the tray 2, and prevents the tray 2 from falling off during the grasping process. The protruding section 21 is preferably an L-shaped structure or an arc-shaped structure, and the arc-shaped structure or the L-shaped structure opens downward.

[0035] In the above solution, the bottom of the tray 2 is provided with a trumpet-shaped structure, which is convenient for placing the tray 2 on the heating assembly and also convenient for taking and placing by a mechanical gripper.

[0036] As a specific implementation method provided in this case, Figure 3 and Figure 5As shown, it also includes a support plate 3 for supporting the tray 2, and a heating component is installed on the support plate 3 at positions corresponding to the positive and negative poles. The heating component is installed on the support plate in a fixed manner or a detachable manner. Preferably, it is installed in a detachable manner.

[0037] As a specific implementation method provided in this case, Figure 3 As shown, the heating assembly includes a fixed block 4, and two heating blocks 41 that match the shape of the positive and negative poles are embedded on the top of the fixed block 4. A groove for placing the explosion-proof valve of the battery 1 is provided between the two heating blocks 41 (not shown in the figure). The heating block 41, the top of the fixed block 41 is provided with a mounting groove 42 for mounting the heating block, and the heating block 41 is placed in the mounting groove 42. The heating block 41 is connected to an external power source through a wire 45 to convert electrical energy into thermal energy. The heating block 41 can be an electric heating block in the prior art.

[0038] Furthermore, a mounting hole 43 (non-through hole contact setting) is provided in the fixing block 4 and below the mounting groove, the mounting hole 43 is connected to the mounting groove 42, a spring 44 is placed in the mounting hole 43, and the spring 44 is fixedly connected to the heating block 41. The function of the spring 44 is to make the positive and negative poles of the battery 1 contact with the respective heating blocks 41 with a certain pressure, play a regulating role, and avoid the situation where the poles are in poor contact with the heating block, which affects the heating effect.

[0039] Overall technical effect:

[0040] 1. The heating efficiency is higher. Since the thermal conductivity of copper-aluminum foil is higher, the pole is contact-heated and dried, and the heat is conducted through the pole ear, so that the battery 1 can be quickly heated to the target temperature.

[0041] 2. The internal heating of the battery cell is more uniform, and the heat can be fully transferred to the inside of the battery 1 through the tab conduction, achieving a drying effect.

[0042] As a specific embodiment provided in this case, fixing bars 31 are arranged at intervals on the support plate 3, and the fixing bars 31 are embedded in the bottom of the fixing block 4 and fixed by bolts 46. For example, the fixing bars are rectangular, cross-shaped or other shapes to improve the stability between the fixing block and the heating plate and prevent shaking.

[0043] The above is a detailed introduction to the product provided by the present invention. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of invention, several improvements and modifications can be made to the invention, and these improvements and modifications also fall within the scope of protection of the invention claims.

Claims

1. A drying device for a lithium battery, the lithium battery comprising positive and negative electrodes, characterized in that: The drying device comprises a tray and a heating component, wherein the tray is placed on the heating component by a gripping device, and the lithium battery is placed in the tray in an inverted manner, and the heating component is in contact with the positive and negative poles respectively, and heats the positive and negative poles respectively by a contact heat conduction method; The tray is provided with grooves or battery holes for placing lithium batteries at intervals, the battery holes or grooves are arranged along a preset height of the tray, and the shapes of the battery holes or grooves are adapted to the lithium batteries; A baffle or a baffle ring is provided at the bottom end of the battery hole, and the baffle or the baffle ring is used to carry the lithium battery; The baffle plate is provided with holes at positions corresponding to the positive and negative electrodes of the lithium battery, and the positive and negative electrodes of the lithium battery are in contact with the heating assembly through the holes respectively; The tray and below the groove is a hollow structure; The drying device also includes a support plate for supporting the tray, and a heating assembly is installed on the support plate at positions corresponding to the positive and negative poles; The heating assembly comprises a fixing block, and two heating blocks matching the shapes of the positive and negative poles are embedded on the top of the fixing block; A mounting groove for mounting the heating block is provided on the top of the fixing block, a mounting hole is provided in the fixing block and below the mounting groove, the mounting hole is communicated with the mounting groove, a spring is placed in the mounting hole, and the spring is fixedly connected to the heating block; Fixing strips are arranged at intervals on the support plate, and the fixing strips are embedded in the bottom of the fixing block and fixed by bolts.

2. The drying device according to claim 1, characterized in that: An extension section is arranged on the top side of the pallet, and the extension section extends in a horizontal direction. A mechanical gripper can replace the pallet by grasping the extension section.

3. The drying device according to claim 2, characterized in that: The extended section is an L-shaped structure or an arc-shaped structure.

4. The drying device according to claim 1, characterized in that: The heating assembly is mounted on the support plate in a fixed manner or in a detachable manner.

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